Auckland Council is carrying out tsunami siren testing at midday in the Rodney and Waitakere areas.
Spokesperson Adam Maggs says the tests will sound for two minutes each, with one minute between each.
"In a real event the tones would last a lot longer, but it's important for us to test the sirens not only to make sure that they're working effectively but also that Aucklanders know what the sound is like."
Maggs says it's a good opportunity for residents to create an escape plan - even if they don't live near the coast.
"Have conversations with their families and neighbours, and just stay connected and know what's going on in your community, so if something like this does happen, people can support each other."
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Residents can subscribe to the Red Cross app to receive alert messaging on their phones.
Maggs says in the event of an earthquake, the message is to run away.
"Basically head for high ground. Check on your neighbours, check on the elderly... people with disabilities, and just make sure they're able to also evacuate."
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